The metrics package is a local module dependency imported by all services
but was missing from every Dockerfile's build context.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Installs Python 3, Node.js/TypeScript for bot validation sandbox.
Base image includes Go; Java/Rust/PHP validation is deferred to follow-up bead.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>